Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q1. 

1)  Rs. 4,250  2)  Rs. 4,500 
3)  Rs. 6,400  4)  Rs. 7200 
5)  None of these 
Answer : Rs. 7200
Explanation :
Explanation :
We know that Sum = (S.I X 100 )/ R X T
= (Diff. in S.I X 100 ) / Diff. in rate X Time
= (72 X100)/ 2 X 5 = Rs. 7200.
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Q2. 
1)  Rs.4000  2)  Rs.5000 
3)  Rs.6000  4)  Rs.7000 
5)  None of these 
Answer : Rs.5000
Explanation : Let, the sum lent at 12% simple interest is Rs.X.
Explanation : Let, the sum lent at 12% simple interest is Rs.X.
So, the sum lent at 15% simple interest is (Rs.12000  x).
Then,
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Q3. 

1)  Rs. 12380  2)  Rs.16176 
3)  Rs.18240  4)  Rs.19020 
5)  None of these 
Answer : Rs.16176
Explanation : SI = [(67400 x 3 x 8) ] /100 = Rs.16176
Explanation : SI = [(67400 x 3 x 8) ] /100 = Rs.16176
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Q4.  A person deposited Rs.8000 which amounted to Rs.9200 after 3 years at simple interest . Had the interest been 2% more, how much he would get ? 
1)  Rs.8,660  2)  Rs.9,680 
3)  Rs.10,620  4)  Rs.11,540 
5)  None of these 
Answer : Rs.9,680
Explanation : Given, P = 8,000 , T=3 yrs A= 9200
Explanation : Given, P = 8,000 , T=3 yrs A= 9200
So, S.I = 9200  8000 = 1200
Then , R = (1200 X 100 ) / 8000 X 3 = 5%
After 2% rate increases , new rate will be 7%.
So, new SI=( 8000 X 3 X 7) / 100 = 1680
Thus, new amount = 8000 + 1680 = 9,680
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Q5.  If Rs.85 amounts to Rs.95 in 3 years, what Rs102 will amounts to in 5 years at the same rate percent ? 
1)  Rs112  2)  Rs.118 
3)  Rs.122  4)  Rs.132 
5)  None of these 
Answer : Rs.122
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Q6.  A sum of money lent at simple interest amounts to Rs.720 after 2 years and to Rs. 1020 after a further period of 5 years. Find the rate of interest. 
1)  6%  2)  8% 
3)  10%  4)  12% 
5)  None of these 
Answer : 10%
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Q7.  Alok borrowed Rs.2500 from two money lenders. For one loan, he paid 5% and for the other, he paid 7% per annum.The total interest paid for two years was Rs.265. How much did he borrow at 7% rate ? 
1)  Rs.625  2)  Rs.825 
3)  Rs.1875  4)  Rs.1675 
5)  None of these 
Answer : Rs.625
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Q8.  A man lent Rs.600 for 2 years and Rs.200 for 3 years at the same rate at simple interest and received only Rs.90 as interest. What was the rate of interest ? 
1)  4%  2)  5% 
3)  6%  4)  7.5% 
5)  None of these 
Answer : 5%
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Q9.  The simple interest on a certain sum of money at 4 % per annum for 4 years is Rs.19 more than interest on the same sum for 3 years at 5% per annum. Find the sum of money. 
1)  Rs.6700  2)  Rs.7500 
3)  Rs.8000  4)  Rs.8500 
5)  None of these 
Answer : Rs.8000
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Q10. 

1)  Rs. 400  2)  Rs. 500 
3)  Rs. 600  4)  Rs. 800 
5)  None of these 
Answer : Rs. 500
Explanation : P = Rs. 100
Explanation : P = Rs. 100
Given, R= 10% Time = 2 yrs
So, C.I = Rs. 21 So,21 % = 525
100% = (525/21) /100 = 2500
Then, P = (2500 x 5 x 4 ) /100 = Rs. 500
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